ISO 643:2019
Withdrawn
View Superseded by
Steels — Micrographic determination of the apparent grain size
Hardcopy , PDF
English, French
12-12-2019
04-09-2025
This document specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensional plane, even in a sample with a perfectly consistent grain size.
| Committee |
ISO/TC 17/SC 7
|
| DocumentType |
Standard
|
| Pages |
21
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy | |
| Supersedes | |
| UnderRevision |
| Standards | Relationship |
| NF EN ISO 643 : 2020 | Identical |
| DIN EN ISO 643:2020-06 | Identical |
| EN ISO 643:2020 | Identical |
| I.S. EN ISO 643:2020 | Identical |
| BS EN ISO 643:2020 | Identical |
| NEN-EN-ISO 643:2020 (Cor. 2020-08) | Identical |
| NS-EN ISO 643:2020 | Identical |
| PN-EN ISO 643:2020-07 | Identical |
| IS 4748 : 2021 | Identical |
| DS/ISO 643:2019 | Identical |
| DS/EN ISO 643:2020 | Identical |
| I.S. EN ISO 643:2020&LC:2020 | Identical |
| UNE-EN ISO 643:2020 | Identical |
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